Question

Why does dry HCl gas not change the colour of the dry litmus paper?

Answer 1

Hydrogen ions change the colour of litmus. In dry \(\mathrm{HCl}\), there are no \(\mathrm{H}^{+}\)ions. Ions are formed in aqueous solution. Both \(\mathrm{HCl}\) and litmus are dry. Hence there is no change in dry \(\mathrm{HCl}\) and dry litmus paper.

Answer 2

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Answer 3

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